Hi I didn’t find solution how to create 64 bit dll. And use it’s native c++ methods. I use Java code metodynatywne.java :
class metodynatywne {
static {
System.loadLibrary("metodynatywne");
}
native public void sayHello();
public static void main (String argv[])
{
new metodynatywne().sayHello();
} }
then generated metodynatywne.h using javah -jni metodynatywne
I wrote metodynatywne.cpp code :
` #include <jni.h>
#include <iostream>
#include "metodynatywne.h"
using namespace std;
JNIEXPORT void JNICALL
Java_metodynatywne_sayHello(JNIEnv * env, jobject self)
{
cout << "Hello World!" << endl;
}
I ussed gcc to create my dll with comands :
c:>c++ -I c:\java7\include -I c:\java7\include\win32 -c metodynatywne.cpp
and
c:>c++ -shared metodynatywne.o -o metodynatywne.dll
and what what I'm getting is error message:
c:>java metodynatywne
Exception in thread “main” java.lang.UnsatisfiedLinkError: C:\Programowanie\UJ\Semestr2\ZPG\PerfCount\cwiczenie\metodynatywne.dll: Can’t lo
ad IA 32-bit .dll on a AMD 64-bit platform
at java.lang.ClassLoader$NativeLibrary.load(Native Method)
at java.lang.ClassLoader.loadLibrary1(Unknown Source)
at java.lang.ClassLoader.loadLibrary0(Unknown Source)
at java.lang.ClassLoader.loadLibrary(Unknown Source)
at java.lang.Runtime.loadLibrary0(Unknown Source)
at java.lang.System.loadLibrary(Unknown Source)
at metodynatywne.(metodynatywne.java:4)
`
I used Java 1.4 32 bit javac compiler and java7 x64 compiler both metods gave me the same error. How can I deal with that? Use another c++ compiler if yes how force this compiler to create usable by my java dll file. I working on Windows 7 64 bit.
How I can make from cpp file a 64 bit dll (with gcc) ? Or other comand line compiler ?
Thanks in advance for help.
